Buggy code:
public class MapView extends CssLayout implements LeafletClickListener { private LMap map = null ; private int zoom_level ; private ArrayList < String > color_panel = new ArrayList < String > ( Arrays . asList ( "#801FEF" , "#7C1DEF" , "#771CF0" , "#721AF2" , "#6B1AF2" , "#6718F2" , "#6016F4" , "#5B15F4" , "#5613F4" , "#5011F6" , "#4911F6" , "#420FF6" , "#3D0EF7" , "#360CF9" , "#2F0AF9" , "#2A08F9" , "#2307FB" , "#1C05FB" , "#1503FB" , "#0E03FD" , "#0701FD" , "#0000FF" , "#0305FD" , "#050CFB" , "#0A11F9" , "#0C18F9" , "#111DF6" , "#1323F6" , "#162AF4" , "#1A2FF2" , "#1C34F2" , "#2138EF" , "#233DEF" , "#2642ED" , "#2A48EB" , "#2D4BEB" , "#2F50E8" , "#3354E8" , "#3459E6" , "#385DE4" , "#3B60E2" , "#3D64E2" , "#4169E1" , "#3F69E2" , "#3D6BE2" , "#3B6BE4" , "#3B6EE6" , "#386EE8" , "#3870E8" , "#3672EB" , "#3474EB" , "#3375ED" , "#3177EF" , "#2F79EF" , "#2D7BF2" , "#2B7CF2" , "#2A7EF4" , "#2882F6" , "#2683F6" , "#2485F9" , "#2387F9" , "#218AFB" , "#1F8CFD" , "#1C90FF" , "#1C90FF" , "#1A93FF" , "#1895FF" , "#1897FF" , "#1699FF" , "#159AFF" , "#139EFF" , "#11A0FF" , "#11A1FF" , "#0FA3FF" , "#0EA5FF" , "#0CA8FF" , "#0AAAFF" , "#08ACFF" , "#08AFFF" , "#07B1FF" , "#05B3FF" , "#03B6FF" , "#01B8FF" , "#01BCFF" , "#00BFFF" , "#07BFFD" , "#0EBFFD" , "#15BFFB" , "#1CBFFB" , "#23BFFB" , "#28BFF9" , "#2FC1F9" , "#36C1F7" , "#3DC1F7" , "#44C1F6" , "#4BC3F6" , "#52C3F4" , "#57C3F4" , "#5EC4F4" , "#64C6F2" , "#6BC6F2" , "#72C8F2" , "#79C8F0" , "#7ECAEF" , "#85CAEF" , "#8CCDEF" , "#8ECDEF" , "#91CFEF" , "#95D1EF" , "#97D3EF" , "#9AD4F0" , "#9ED6F0" , "#A1D6F2" , "#A3D8F2" , "#A8DAF2" , "#AADBF2" , "#AEDDF4" , "#B1DDF4" , "#B3DFF4" , "#B8E1F4" , "#BAE2F6" , "#BDE4F6" , "#C1E6F6" , "#C4E6F6" , "#C8E8F7" , "#CAE9F7" , "#CFEBF9" , "#FFFFC8" , "#FFFDBF" , "#FFFDB8" , "#FFFDB1" , "#FFFBAA" , "#FFFBA3" , "#FFF99C" , "#FFF995" , "#FFF78E" , "#FFF687" , "#FFF680" , "#FFF479" , "#FFF272" , "#FFF06B" , "#FFEF62" , "#FFED5B" , "#FFEB54" , "#FFE94D" , "#FFE646" , "#FFE43F" , "#FFE238" , "#FFE131" , "#FFDD2F" , "#FFDB2D" , "#FFDA2A" , "#FFD628" , "#FFD426" , "#FFD323" , "#FFCF21" , "#FFCD1D" , "#FFCA1C" , "#FFC81A" , "#FFC616" , "#FFC315" , "#FFC113" , "#FFBD0F" , "#FFBA0E" , "#FFB80A" , "#FFB508" , "#FFB307" , "#FFAF03" , "#FFAC01" , "#FFAA00" , "#FFA700" , "#FFA300" , "#FFA100" , "#FF9E00" , "#FF9A00" , "#FF9700" , "#FF9500" , "#FF9300" , "#FF9000" , "#FF8C00" , "#FF8900" , "#FF8700" , "#FF8300" , "#FF8000" , "#FF7E00" , "#FF7C00" , "#FF7900" , "#FF7500" , "#FF7200" , "#FF7000" , "#FF6E00" , "#FF6700" , "#FF6200" , "#FF5D00" , "#FF5900" , "#FF5200" , "#FF4D00" , "#FF4900" , "#FF4400" , "#FF3D00" , "#FF3800" , "#FF3400" , "#FF2F00" , "#FF2800" , "#FF2300" , "#FF1F00" , "#FF1A00" , "#FF1300" , "#FF0F00" , "#FF0A00" , "#FF0500" , "#FF0000" , "#FB0000" , "#F90000" , "#F60000" , "#F40000" , "#F00000" , "#EF0000" , "#EB0000" , "#E90000" , "#E60000" , "#E40000" , "#E20000" , "#DF0000" , "#DB0000" , "#DA0000" , "#D60000" , "#D40000" , "#D10000" , "#CF0000" , "#CD0000" , "#CA0000" , "#C80000" , "#CA0505" , "#CD0C0C" , "#CF1313" , "#D11A1A" , "#D42323" , "#D62A2A" , "#DA3131" , "#DB3A3A" , "#DF4242" , "#E24B4B" , "#E45252" , "#E65B5B" , "#E96464" , "#EB6E6E" , "#EF7777" , "#F08080" , "#F48989" , "#F69393" , "#F99C9C" , "#FBA7A7" , "#FFB1B1" ) ) ; @ Override public void attach ( ) { } private void buildView ( ) { } public Boolean updateClusterMap ( String dataset_key ) { } private void popUp ( Object para ) { } @ Override public void onClick ( final LeafletClickEvent event ) { } public Boolean updateOriginalMap ( String dataset_key ) { if ( ( map ) == null ) { buildView ( ) ; } Iterator < Component > iterator = map . iterator ( ) ; Collection < Component > remove = new ArrayList < Component > ( ) ; while ( iterator . hasNext ( ) ) { Component next = iterator . next ( ) ; if ( ( next instanceof LCircleMarker ) || ( next instanceof LPolyline ) ) { remove . add ( next ) ; } } for ( Component component : remove ) { map . removeComponent ( component ) ; } zoom_level = 3 ; map . setZoomLevel ( zoom_level ) ; map . setCenter ( new Point ( 43.041809 , ( - 87.906837 ) ) ) ; HadoopData hd = HadoopData . getInstance ( ) ; ArrayList < ArrayList < String > > dataset = hd . getOriginalDataSet ( dataset_key ) ; LCircleMarker cMarker = null ; String color = "FF0000" ; for ( ArrayList < String > tmp : dataset ) { <START_BUG> cMarker = new LCircleMarker ( Double . parseDouble ( tmp . get ( 2 ) ) , Double . parseDouble ( tmp . get ( 1 ) ) , 2 ) ; <END_BUG> cMarker . setColor ( color ) ; cMarker . setOpacity ( 0.9 ) ; map . addComponent ( cMarker ) ; } return true ; } }

Fix:
cMarker = new LCircleMarker ( Double . parseDouble ( tmp . get ( 1 ) ) , Double . parseDouble ( tmp . get ( 0 ) ) , 2 ) ;